Pump dispensing device for liquid containers



May 25, 1965 E, LIPMAN PUMP DISPENSING DEVICE FOR LIQUID CONTAINERS 2 Sheets-Sheet l Filed June 4, 1965 M, T: E/mn O 4H f/ 3 v 4 a INVENTOR. 'Mf? /PMAN "Y W/ A TTOR/VEY May 25, 1965 E. LIPMAN Filed June 4, 1963 2 Sheets-Sheet 2 f 20 l n? /o INVENTOR.

A 7 TOR/vf Y 3,185,354 PUMP DISPENSNG DEVICE FR LIQUD CNTAENERS Eimer Lipman, South Lyon, Mich., assigner to Valve Corporation of America, Bridgeport, Conn., a corporation of Belaware Filed .lune 4, 1953, Ser. No. 285,415 3 Claims. (Ci. 222-321) This invention relates to a pump dispensing device for liquid containers capable of sealing a container for shipping and storage and dispensing liquid from the container in incremental portions for use. It particularly relates to a novel pump construction which seals olf the container positively at the end of the return suction stroke of the piston. During suction and compression strokes of the piston the device opens communication to atmosphere to admit air to the container and emit liquid from the container to use.

Closure caps and dispensers have been employed heretofore in an attempt to provide a positive seal for a container which also embodies the dispenser capabilities, however, the several devices of the prior art have not proven entirely satisfactory inasmuch as they are complicated in design and construction, expensive to manufacture, and not positive in operation and therefore not satisfactory in use.

With the foregoing in View, the primary object of the invention is to provide a dispenser and closure device for containers which is simple in design and construction, inexpensive to manufacture, easy to use, positive in its sealing operation, and positive in its dispensing operation.

An object of the invention is to provide a sealing and dispensing cap which is easily mounted on a container such as o n an ordinary bottle cap.

An object of the invention is to provide a cylinder which communicates with the liquid contents of a container such as through a dip tube.

An object of the invention is to provide a check valve in the cylinder permitting liquid ow into the cylinder on the piston suction stroke and preventing ow from the cylinder on the piston compression stroke.

An object of the invention is to provide a piston and a cylinder which is sealed relative to the cylinder walls and operated by a plunger which is not sealed relative to the cylinder-walls.

An object of the invention is to provide a vacuum break breather aperture in the cylinder walls opened by the piston during the compression and suction strokes so that it can communicate between the interior of the container and atmosphere in the space between the plunger and the cylinder and sealed off by the piston at the end of the return stroke.

An object of the invention is to provide a poppet valve in the plunger seated by the spring at the end of the return stroke to seal o the interior of the cylinder and container relative to the plunger and atmosphere.

An object of the invention is to provide a shoulder in the cylinder which immediately contacts the spring upon initiation of the compression stroke so as to release the poppet valve from spring pressure seating to permit liquid pressure in the chamber to unseat the poppet valve and emit liquid from the cylinder through the plunger to use.

These and other objects of the invention will become apparent by reference to the following description of the novel pump container closure means and dispensing means embodying the invention taken in connection with the accompanying drawings in which:

FIG. l is an enlarged longitudinal cross sectional view of the device embodying the invention shown mounted on a container cap and container with the container partially broken away illustrating the positively sealed condition.

vvFIG. 2 is a View similar to FIG. 1 showing the initiation of the compression stroke with the spring seated on the cylinder shoulder to relieve spring pressure on the poppet valve.

FIG. 3 is a view similar to FIGS. 1 and 2 showing the device slightly farther advanced in the compression stroke with the poppet valve moved off the seat by iluid pressure.

FIG. 4 is a View similar to FIGS. l-3 showing the device at the end of the compression stroke and/or the beginning of the suction stroke; and

FIG. 5 is a view showing the novel device in elevation mounted on a modiied cap on a container showing the cap and container in cross section with the container broken away.

Referring now to the drawings wherein like numerals refer to corresponding parts throughout the several views, the novel dispensing sealing pump device disclosed therein to illustrate the invention comprises a container 10, a cap 11 attached to the container 10, and a dispensingsealing pump device 12 secured in the central aperture 13 of the cap and depending into the container 10 so that one end of the pump device 12 is within the container 10 and the other end of the device 12 is outside the container 10 in atmosphere.

The pump device 12 has breather means for admitting atmospheric pressure into the interior of the container 10 preventing low pressure developing in the container. The pump device 12 also has sealing means for closing the breather means to positively seal the container. The pump device also includes means for pumping liquid from the interior of the container 10 t-o atmosphere through a hollow plunger. The pump device also has means for sealing ott the hollow plunger from atmosphere and from liquid in the container. Thus the device has fully operative dispenser means and fully operative sealing container closure means.

More particularly, the device 12 comprises a cylinder 20 having walls interiorly dening a check valve seat 21, a spring support shoulder 22, a pumping chamber 23, and a plunger slide channel 24. The cylinder 2? has an outwardly flanged top 25 abutting a cap 11 on the container 10. A dip tube 26 extends from the cylinder 20 below the ball seat 21 to the bottom of the container 10.

A ball check 30 rests on the valve seat 21, a spring 31 lies in the pumping chamber I23 above the shoulder 22, a piston 32 lies in the pumping chamber 23 abutting the spring 31. The piston 32 is equipped wit-h a central aperture 33 for emitting liquid from the pumping chamber 23. The pist-on 32 is equipped With a top bead 34 and a bottom bead 35 which seal ott the vacuum break breather aperture 27 in the cylinder 20 when the piston is at the end of its return stroke as seen in FIG. 1.

A plunger 36 is fitted in .sliding spa-ced relationship relative to the cylinder 2@ in the plunger channel .24. The plunger 36 has an outwardly turned flange 37 abutting the piston 32. The plunger 36 and piston 32 are interconnected for movement together. A ferrule 38 is press fitted in the cylinder plunger chamber 24 in slightly spaced :relationship to the plunger 36 and is equipped with a top iiange abutting the cylinder ange 25. The ferrule 33 has a lower end 39 adapted to abut the ange 37 on the plunger to limit its upward travel thereby preventing movement of the plunger and piston out of assembled relationship with the cylinder 20.

A poppet valve seat 450 is located in the plunger 36 and is attached thereto for movement therewith. As shown, the poppet valve seat may be formed integral with the cylinder 32 as an extension thereof. A poppet valve 41 lies in the plunger 36 on the seat 46 and is equipped with a stem 42 leading downwardly through the plunger 36, piston 32, and spring 31. The stem 42 has a bottom Ifoot 43 for abutting a collar 44 on the spring 31.

The stem 42 is of such designed length that upon the piston 34 reaching the end of its upward travel the valve stem foot 43 contacts the spring collar 44 lifting the spring out of engaged relationship with the shoulder 22. In this condition the spring 3l. reacts against the piston 32 at one end and the valve stem foot 43 at the other end and pulls the poppet valve 41 into pressed relationship with the poppet valve seat 40 sealingl off the plunger 36. Also in this condition the piston radially overlies the breather aperture 27 sealing it oil, Thus communication between atmosphere and the interior of the container 1Q is completely sealed oil upon the spring 31 returning the piston 32.

During the piston compression and suction strokes atmospheric pressure communicates between the ferrule 38 and the plunger 36 downwardly in the cylinder 26 to the breather aperture 27 above the piston top bead 34.

A dispensing' and operating head 45 may be fixed on f forced through the piston and sleeve in the initial subassembly. The piston and sleeve are then inserted in the plunger 36 in attached relationship or cemented as desired. The spring 31 is then passed over the valve stem foot 43 and the collar 44 turned thereover completing the sub-assembly of these parts. The ferrule 3S is placed around the plunger 36 and the operator head 45 fixed on the end of the plunger 36. The sub-assembly is then inserted in the cylinder 2i). Theferrule 38 is then driven into pressed itting relationship Vwith the cylinder 2i) as shown fiXedly annexing the parts together, Since the plunger 36 is loosely slidably disposed in the ferrule 38, the head 45, plunger 36, and piston 32 are easily moved up and down in the cylinder 2G between the positions illustrated in FIGS. l-4.

Upon the inventive device being so assembled it is now ready for attachment to any type of cap or other container closure such as the cap 11 in FIGS. l-4 and the cap 60 of FIG. 5.

When used with the metal cap 11, the pump device is pressed through the cap central aperture 13 until the cylinder ilange 25 abuts the top of the cap 11. A sealing Iwasher 5t) is positioned between the container lil and the cap 11 and has a portion -51 disposed between the container 10 and the cylinder 20. This seals the container relative to both the cylinder 2i) and the cap 11.

In the .modication shown in FIG. 5, a malleable sealing and mounting insert 61 is disposed between the cap 6I! and the cylinder 26. A sealing washer 62 is positioned between the container 10 and the cap 6). Obviously the insert 61 and the washer 62 can be integrated in one piece if desired. If is also to be .understood that the sealing washer 50, FIGS. l-4 can be integrated in a two piece embodiment if desired.

While the device has been described as being mountable on a cap which in turn is mounted on a container, it is obvious that the device can be mounted directly on the container if desired.

In operation, to pump liquid from the container 10, the user depresses the head 45. The tirst immediate portion of the depressing movement in the compression stroke moves the head 45, plunger 36, and piston 32, spring 31, valve seat 4l), poppet valve 41, valve stem 42, and foot 43 downwardly relative to the cylinder 29. In this iirstimmediate portion of the downward movement, the spring 31 contacts the shoulder 22 in the cylinder 20. This immediately relieves tension on the valve stem 42. This condition is illustrated in FIG. 2. This mechanically unlocks the poppet valve 41. This also seats the ball 30 on the seat 21.

In the next immediate portion of the compression stroke, the piston 32 places the liquid under pressure in the pump chamber 23 as liquid is prevented from escaping back intov the the container by the check ball 3@ sealing against the seat 21. The pressure developed in the pump chamber 23 now reacts against the poppet valve 41 lifting it slightly olf the seat 43 sufficiently to permit the liquid to escape from the pump chamber 23 past the poppet valve 41. The liquid escapes through the piston central aperture 33 and hollow plunger 36 and enters the head 45. The head emits the liquid through the nozzle 46 to atmosphere in a spray or through a spout in a stream as desired. In the complete compression stroke the piston moves from the piston seen in FIG. l through the positions seen in FIGS. 2 and 3 to the position seen in FIG. 4. In FIG. 4 it will be noted that the poppet valve 41 is closely adjacent to the seat 49.

It is to be noted in the position of the piston 32 in FIG. 3 and FIG. 4, that the breather aperture 27 in the cylinder 20 is left open by the travel of the piston downwardly from the position of FIG. 3 to the position of FIG. 4 and during the travel of the piston 32 upwardly from the position in FIG. 4 to the position of FIG. 3. During this travel atmospheric pressure communicates with the interior of the container 10 through the slide passage between the plunger 36 and the ferrule 38 preventing low pressure developing in the container 16 occasioned by the pumping of liquid therefrom. This insures an easy draw of liquid from the container on the suction stroke of the piston 32.

Upon the user depressing the operator head 45 to position of FIG. 4 the compression stroke of the piston is completed and the dispensed portion of liquid is pumped from the container. The user then releases the head 45 and the spring 31 reacting against the cylinder shoulder 22 elevates the piston 32, plunger 36, head 45, and seat 40. Due to the fact that the poppet valve 41 remains closely adjacent the seat 40 in the presence of liquid, immediately upon upward movement of the piston 32 developing suction, the poppet valve 41 is sucked closed on the seat 4t). Also due to the fact that the valve stem 42 and poppet valve 41 are free floating in the position of FIG. 4, gravity and inertia assist in immediately closing the valve 41 against the seat 40 upon the spring 31 moving the piston 32 upwardly. The upward movement of the piston is sealed at the top by the poppet valve 41 on the seat 40. This develops a low pressure in the piston chamber 23 and draws liquid from the container through the dip tube 26 past the ball check 30 which sufliciently unseats the ball 3) to permit passage of the liquid. The spring 31 moves the piston 32 and plunger 36 upwardly from the position of FIG. 4 in the suction stroke through the positions of FIGS. 3 and 2 to the position of FIG. l.

When the device reaches the position of FIG. 2, the valve stem foot 43 'contacts the spring collar 44 lifting the spring 31 out of reaction contact with the shoulder 22 and forceably seating the poppet valve 41 on the seat 40.V

At this point pressure is equalized in the container 10 and pumping chamber 23. The substantially equalized pressure condition would normally then allow the poppet valve 41 to unseat relative to the seat 40. However, this cannot happen since the spring 31 mechanically pulls the poppet valve 41 in sealing relationship to the seat 40 regardless of equalized pressure condition. It is also to be noted that the normal position of FIG. l the piston 32 is so located that the top bead 34 seals relative to the cylinder 2d above the breather aperture 27. This positively seals oi communication from `the container to atmosphere and from atmosphere to the container.

It is to be observed that the device automatically completely seals oli the container at the normal position of FIG. 1 which is the start of the compression stroke and the end of the suction stroke. Thus the device is always sealed and ready to dispense.

The sealing-dispensing pump device of the invention permits manufacturers and sellers of various liquids such as perfume, cologne, toilet water, lighter iiuid, medicines, pharmaceutical preparations, detergents, liquid soaps, shampoos, and etc. to provide a dispensing means on the containers with the positive assurance that the container is positively sealed for shipping and storage and immediateiy ready for user operation upon unpackaging.

It is to be noted that the normal position of FIG. 1 the piston 32 is so located hat the top bead 34 seals relative to the cylinder 29 above the breather aperture 27. This positively seals oft communication from the container to atmosphere and from atmosphere to the container.

While only a single embodiment of the inventive device has been shown and described in detail, it is obvious that many changes may be made in the size, shape, detail and arrangement of the various elements of the invention within the scope of the appended claims.

I claim:

1. A dispenser-closure device for liquid containers capable of sealing a container for shipping and storage and dispensing liquid from a container in incremental portions for use comprising,

a cap having means for attachmen-t to a container;

and an opening to surmount a container opening,

a cylinder in said cap opening having a bottom dip tube, a lower ball valve seat, a spring support shoulder, a piston chamber, and a vacuum break breather aperture spaced from said ball valve seat deiining a pump chamber therebetween,

means for sealing oft said cylinder relative to said cap and said cap relative to a container,

means for fixing said cylinder to said cap,

a ball valve on said ball seat,

a spring having a lower end adjacent said support shoulder and an upper end,

a piston in said cylinder pump chamber,

a hollow plunger having one end slidably located in said cylinder fixed to said piston and an opposite end extending from said cylinder;

sai-d spring normally pressing against said cylinder shoulder and said piston to urge said piston and said plunger upwardly in said cylinder,

means limiting the upward spring driven movement of said piston in said cylinder to position said piston at a point at least partially above said cylinder breather aperture at the end of said pistons upstroke to seal oi atmospheric communication to said aperture;

said plunger being spaced from said cylinder to permit atmospheric communication to said cylinder breather aperture when said piston is below said breather aperture;

said piston having an orifice leading from said cylinder pump chamber to said plunger interior to deliver liquid to use,

a poppet valve seat in said plunger above said cylinder,

a valve stem on said poppet valve depending through said piston orice and said spring terminating in a foot iiange below and normally -in contact with said spring lower end limiting upward thrust of said spring between said shoulder and said piston so as to pull said valve stern downwardly to seat said poppet valve on said seat positively sealing oit said plunger above said piston,

manually depressing said plunger and said piston against said spring first moving said spring lower end against said shoulder and moving said poppet valve seat down shortening the distance between said poppet valve seat and shoulder releasing spring tension on said valve stem to permit said poppet valve ito move ot said seat;

compression of liquid in said pump chamber sealing said ball check and moving said poppet valve off said poppet valve seat whereupon further downward movement of said plunger and piston drives fluid from said pump chamber through said piston orifice past said poppet valve seat into said plunger;

release of manual depression of said plunger and piston permits said spring to urge said piston and plunger upwardly in a suction stroke with initial gravity, uid friction, and inertia sealing said poppet valve on said seat whereupon further upward movement of said piston lifts said ball oft said seat and draws fluid into said pump chamber through said dip tube from a container;

said piston and plunger being moved upwardly by said spring until said valve stem foot contacts said spring pulling said poppet valve onto said seat mechanically with said spring in idle condition relative to said shoulder and with said piston sealing oit said cylinder breather aperture mechanically so that said device positively seals off the interior of a container relative to atmosphere.

2. A dispenser-closure device for liquid containers capable of sealing a container for shipping and storage and dispensing liquid from a container in incremental portions for use comprising,

means on said device for sealing to a container,

means on said device defining a cylinder having a bottom dip tube, a lower ball valve seat, a spring support shoulder, a piston chamber, and a vacuum break breather aperture spaced from said ball valve seat deiining a pump chamber therebetween;

a ball valve on said ball seat,

a spring having a lower end adjacent said support shoulder and an upper end,

a piston in said cylinder pump chamber,

a hollow plunger having one end slideably located in said cylinder fixed to said piston and an opposite end extending from said cylinder;

said spring normally pressing against said cylinder shoulder and said piston to urge said pistou and said plunger upwardly in said cylinder,

means limiting the upward spring driven movement 0f said piston in said cylinder to position said piston at a point at least partially above said cylinder breather aperture at the end of said pistons upstroke to seal ott atmospheric communication to said aperture;

said plunger being spaced from said cylinder to permit atmospheric communication to said cylinder breather aperture when said piston is below said breather aperture;

said piston having an orifice leading from said cylinder pump chamber to said plunger interior to deliver liquid to use,

a poppet valve seat in said plunger,

a poppet valve in said plunger on said poppet valve seat,

a valve stem on said poppet valve depending through said piston orifice and said spring terminating in a foot iiange below and normally in contact with said spring lower end limiting upward thrust of said spring between Said shoulder and said piston so as to pull said valve stem downwardly to seat said poppet valve on said seat positively sealing otf said plunger above said piston.

manually depressing said plunger and said piston against said spring first moving said spring lower end against said shoulder and moving said poppet valve seat down shortening the distance between said poppet valve seat and shoulder releasing spring tension on said valve stem to permit said poppet valve to move off said seat;

compression of liquid in said pump chamber sealing said ball check and moving said poppet valve off said poppet valve seat whereupon further downward movement of said plunger and piston drives iluid t 7 from said pump chamber through said piston orilice past said poppet valve seat into said plunger;

release of manual depression of said plunger and piston permits said spring to urge said piston and plunger upwardly in a suction stroke with initial gravit fluid friction, and inertia sealing said poppet valve on said seat whereupon further upward movement of said piston lifts said ball olf said seat and draws fluid into said pump chamber through said dip tube from a container; Y

said piston and plunger being moved upwardly by said spring until said valve stem foot contacts said spring pulling said poppet valve onto said seat mechanically with said spring in idle condition relative to said shoulder and with said piston sealing off said cylinder breather aperture mechanic-ally so thatl said device positively seals ol the interior of a container relative to atmosphere.

A pump having an association of components normally assuming -a return position at the end of its suction stroke sealing off .a container on which said pump is mounted relative to atmosphere'and capable of communicating to atmosphere when out of said return position during the compression and suction strokes to deliver liquid from the container to use and to admit atmospheric pressure to the container to compensate for pumped out liquid comprising,

a cylinder having check valve seat, a shoulder, a piston chamber above said shoulder, a vacuum break breather aperture adjacent the top of said piston chamber, and `a plunger chamber above said piston chamber,

means for sealably attaching said cylinder to a cona piston having an axial orifice in said cylinder charnber contacting said spring upper end and urged resiliently upwardly by said spring reacting against said shoulder,

a hollow plunger loosely slidably lying in said cylinder plunger chamber communicating with said piston orifice and connected to said piston,

stop means on said cylinder for abutting one said plunger and piston at a point in the return stroke to establish the end of the return stroke to locate said piston radially of said cylinder breather aperture to sealably block olf communication through said aperture,

poppet valve seat in said plunger above said piston, poppet valve in said plunger on said poppet valve seat, Y

stem on lsaid poppetvalve extending in spaced relationship through said plunger, said piston, and said coil spring, and a foot on said stem below said spring;

said spring having a collar loosely surmounting said stem above said foot for contacting said foot;

said stem being slightly shorter in relative extension between said poppet valve seat and said foot than the relative movement of said piston, plunger, and spring between said stop means and said shoulder to transfer the reaction of said spring from said shoulder to said foot on said stem thereby tensioning said stem pulling said poppet valve against said poppet valve seat positively sealing otrcommunication through said device between atmosphere and the interior of a container upon which the device is mounted;

initially depressing said plunger and piston in the compression stroke seating said vspring bottom end on said shoulder and further depressing said spring releasing tension on said stem permitting liquid under pressure in said cylinder to lift said poppet valve off said seat permitting liquid to emit from said plunger;

release of said plunger at the end of the compression stroke permitting said spring to effect the suction stroke whereupon friction, inertia, and gravity seats said poppet valve closing the emission exit from said pump chamber whereupon the suction Stroke unseats said ball check -valve and iills said pump chamber with liquid from a container;

the return stroke terminating when said foot contacts said spring collar seating said poppet valve with said piston sealing oi said cylinder breather aperture positively sealing off communication between a container and atmosphere.

References Cited bythe Examiner UNITED STATES PATENTS 2,362,080 11/44 Martin 222-321 2,657,834 11/53 Bacheller 222-321 2,681,622 6/54 Titus 222-321 X 2,889,964 6/ 59 Cooprider 222-321 3,044,413 7/62 Corsette 222-321 X RAPHAEL M. LUPO, Primary Examiner.

HADD S. LANE, Examiner, 

1. A DISPENSER-CLOSURE DEVICE FOR LIQUID CONTAINERS CAPABLE OF SEALING A CONTAINER FOR SHIPPING AND STORAGE AND DISPENSING LIQUID FROM A CONTAINER IN A INCREMENTAL PORTIONS FOR USE COMPRISING, A CAP HAVING MEANS FOR ATTACHMENT TO A CONTAINER; AND AN OPENING TO SURMOUNT A CONTAINER OPENING, A CYLINDER IN SAID CAP OPENING HAVING A BOTTOM DIP TUBE, A LOWER BALL VALVE SEAT, A SPRING SUPPORT SHOULDER, A PISTON CHAMBER, AND A VACUUM BREAK BREATHER APERTURE SPACED FROM SAID BALL VALVE SEAT DEFINING A PUMP CHAMBER THEREBETWEEN, MEANS FOR SEALING OFF SAID CYLINDER RELATIVE TO SAID CAP AND SAID CAP RELATIVE TO A CONTAINER, MEANS FOR FIXING SAID CYLINDER TO SAID CAP, A BALL VALVE ON SAID BALL SEAT, A SPRING HAVING A LOWER END ADJACENT SAID SUPPORT SHOULDER AND AN UPPER END, A PISTON IN SAID CYLINDER PUMP CHAMBER, A HOLLOW PLUNGER HAVING ONE END SLIDABLY LOCATED IN SAID CYLINDER FIXED ON SAID PISTON AND AN OPPOSITE END EXTENDING FROM SAID CYLINDER; SAID SPRING NORMALLY PRESSING AGAINST SAID CYLINDER SHOULDER AND SAID PISTON TO URGE SAID PISTON AND SAID PLUNGER UPWARDLY IN SAID CYLINDER, MEANS LIMITING THE UPWARD SPRING DRIVEN MOVEMENT OF SAID PISTON IN SAID CYLINDER TO POSITION SAID PISTON AT A POINT AT LEAST PARTIALLY ABOVE SAID CYLINDER BREATHER APERTURE AT THE END OF SAID PISTON''S UPSTROKE TO SEAL OFF ATMOSPHERIC COMMUNICATION OF SAID APERTURE; SAID PLUNGER BEING SPACED FROM SAID CYLINDER TO PERMIT ATMOSPHERIC COMMUNICATION TO SAID CYLINDER BREATHER APERTURE WHEN SAID PISTON IS BELOW SAID BREATHAPERTURE; SAID PISTON HAVING AN ORIFICE LEADING FROM SAID CYLINDER PUMP CHAMBER TO SAID PLUNGER INTERIOR TO DELIVER LIQUID TO USE, A POPPET VALVE SEAT IN SAID PLUNGER ABOVE SAID CYLINDER, A VALVE STEM ON SAID POPPET VALVE DEPENDING THROUGH SAID PISTON ORIFICE AND SAID SPRING TERMINATING IN A FOOT FLANGE BELOW NORMALLY IN CONTACT WITH SAID SPRING LOWER END LIMITING UPWARD THRUST OF SAID SPRING BETWEEN SAID SHOULDER AND SAID PISTON SO AS TO PULL SAID VALVE STEM DOWNWARDLY TO SEAT SAID POPPET VALVE ON SAID SEAT POSITIVELY SEALING OFF SAID PLUNGER ABOVE SAID PISTON, MANUALLY DEPRESSING SAID PLUNGER AND SAID PISTON AGAINST SAID SPRING FIRST MOVING SAID SPRING LOWER END AGAINST SAID SHOULDER AND MOVING SAID POPPET VALVE SEAT DOWN SHORTENING THE DISTANCE BETWEEN SAID POPPET VALVE SEAT AND SHOULDER RELEASING SPRING TENSION ON SAID VALVE STEM TO PERMIT SAID POPPET VALVE TO MOVE OFF SAID SEAT; COMPRESSION OF LIQUID IN SAID PUMP CHAMBER SEALING SAID BALL CHECK AND MOVING SAID POPPET VALVE OFF SAID POPPED VALVE SEAT WHEREUPON FURTHER DOWNWARD MOVEMENT OF SAID PLUNGER AND PISTON DRIVES FLUID FROM SAID PUMP CHAMBER THROUGH SAID PISTON ORIFICE PAST SAID POPPET VALVE SEAT INTO SAID PLUNGER; RELEASE OF MANUAL DEPRESSION OF SAID PLUNGER AND PISTON PERMITS SAID SPRING TO URGE SAID PISTON AND PLUNGER UPWARDLY IN A SUCTION STROKE WITH INITIAL GRAVITY, FLUID FRICTION, AND INERTIA SEALING SAID POPPET VALVE ON SAID SEAT AND WHEREUPON FURTHER UPWARD MOVEMENT OF SAID PISTON LIGTS SAID BALL OF SAID SEAT AND DRAWS FLUID INTO SAID PUMP CHAMBER THROUGH SAID DIP TUBE FROM A CONTAINER; SAID PISTON AND PLUNGER BEING MOVED UPWARDLY BY SAID SPRING UNTIL SAID VALVE STEM FOOT CONTACTS SAID SPRING PULLING SAID POPPET VALVE ONTO SAID SEAT MECHANICALLY WITH SAID SPRING IN IDLE CONDITION RELATIVE TO SAID SHOULDER AND WITH SAID PISTON SEALING OFF SAID CYLINDER BREATHER APERTURE MECHANICALLY SO THAT SAID DEVICE POSITIVELY SEALS OFF THE INTERIOR OF A CONTAINER RELATIVE TO ATMOSPHERE. 